Extracting appliance for use in oil or gas wells.



A. P. MQBRIDE.

EXTRACTING APPLIANCE FOR USE IN OIL 0R GAS WELLS.

' APPLICATION FILED MAR. 29, 1911 1,017,305, Patented Feb. 13,1912.

J "1 H! 'I F m A 1 $1 7 m v /A 4W llllnl UNITED sT TEsrATEnT OFFICE.

ALBERT P. MCBRIDE, OF INDEPENDENCE, KANSAS.

' EXTRACTING APPLIANCE FOR USE IN OIL ORlG-AS WELLS.

Specification 01 Letters Patent.

Patented Feb. 13, 1912.

Application filed March 29, 1911. Serial No. 618,191.

To all whom it. concern... i Be it known that I, ALBERT P. MoBmDE, a citizen of the United States, residing at Independence, in "the county of Montgomery.

of the character outlined, of such construction that the customary fishing appliancesmay be-used at the same time to assist in the removalof a detached part of a tool or pipe.

A still further object is to produce appliances of the character mentioned which are of simple, strong, durable and compara tively inexpensive construction.

With. these general objects in view and others as hereinafter appear,,the inventlon consists in certain novel and peculiar features of. construction and organization .as hereinafter described and claimed; and in order that it may be fully understood reference is to be had to the accompanying drawing, in which- Figure 1, shows a part of an oil or'gas well with thecasing therein and the detached lower end of a boring tool,and also showsin central vertical section appliances for effecting the removal of the detachedend of the tool from the well. Fig. 2, 'isla horizontal section on the line II-II of Fig. 1. Fig. 3, is an enlarged perspective view of the slip or gripper forming apart of.

such appliances.

Referring now to the drawings, in detail,

1 indicates the customary casing fitting in the boring or well 2, and 3 indicates that portion of the boring which is below the casing, 4 indicating the detached or brokenofi end of a boring tool.

5 indicates a cylinder or bowl which, is

preferably about twelve inches deep and about seven and one-half inches external diameter. At its upper end it is internally threaded at 6 and from the lower end of the threaded portion it is of substantially uniform diameter for about half or more than half itslength, by preference. From the lower end of the portion of substantially uniform diameter, the walls taper inwardly to or nearly to their lower ends at 7 and at its lower extremity the cylinder or bowl is beveled to produce the flaring mouth 8 whereby the bowl or cylinder can be more readily centered and slipped over the upper end of the detached or broken-off portion 4 of the tool or other cylindrical object which it is desired to remove from the well. A circular slip or'gripper 9 is of size to slip downin the cylinder or bowl until it is engaged with the downward tapering portion 7 of the wall, and is externally tapered to correspond with the taper of said portion 7 Internally it is. formed with upwardly-disposed teeth 10, of the ratchet type in cross section, and at its lower extremity the slip or gripper is, beveledat 11 to form wardly flaring mouth for greater convenience and despatch in slippingover the upper end of the detached or broken-off end of the-tool. This slip or gripper consists of a plurality of segments l2, each segment having a V-shaped notch 13 in-one end and a corresponding projection 14 at the opposite end so that'when the projection of one segment engages the notch of the other, and the slip or gripper is within the cylinder or bowl, it will be impossible for either segment to become disengaged from its companion segment, and for convenience in holding the segments together and permit of their swinging toward and from each other, a, pivot pin 15 extends downward through one of them and-across the notch inthe end thereof and through the V-shaped end of the other which engages said notch. Fitting a downupon the slip or gripper when arranged within the cylinder or bowl is a helical spring 16, and resting upon the upper end of said spring is a ring 17.

When it is desired to remove the detached end ofa tool or other cylindrical object from the well, the slip or gripper is dropped into the cylinder or bowl until arrested by the lower part of the beveled portion 7 thereof. The spring is then dropped into the cylinder or bowl upon the slip or gripper and the ring 17 placed upon the upper end of the spring. The bowl is then secured upon one end of the tube 18, and the spring is placed under compression by the ring through the downward movement imparted to the latter by the lower end of the tube. The appliance is then lowered into the casing and additional tube sections 18, not shown, are coupled together until the L pa lower end of the bowl slips over the upper end of the detached or broken-off end t of the tool or other cylindrical object, the appliance being then lowered, by preference,

here is of slightly less diameter than that of such part 4. The spring yields under such upward movement of the slip or gripper until the latter expands sufliciently to slip over the upper end of the tool. When the tool or appliance is lowered the desired distance the spring reexpands and forces the slip or gripper downward until the tapered portion 7 of the cylinder or bowl clamps the segments 12 firmly upon the tool or part 4:. When thus arranged a screw jack, not shown, is employed to exert'an upward'pull upon the topmost tube 18, this upward pull being applied by the slip or gripper on the tool or part 4, there being no slippage as the wedge relation between the slip or gripper and the cylinder or bowl increases the grip, of the former upon part 4, proportionately as the pull on the screw jack increases.

Under ordinary conditions the operation described results in loosening and raising the-tool or part 4. In the event that it is impossible to effect the removal of the. tool or part in the manner and by the means described, it is possible to go down through the line of tube 18, with what is technically known as a set of fishing tools and a cable, not shown, because of common and well known construction and use. By means of these fishing tools an upward jerking action canbe applied on part 4 without inter-' fering with the steady upward pull on'said .by the slip or gripper, because the part 4: it suddenly. loosened under the upward jarring action, ward as the slip or gripper will instantly move upward and outward and release it,

. the spring yielding and then reacting suddenly so that the slip or gripper shall be ready to reengage and hold the part 4 as the upward movement imparted to the same by the fishing tools ends. After the part is thus loosened the fishing tools may be removed and the appliances described and shown, relied upon to lift the art out of the well, the tube sections 18 being uncoupled as they successively emerge from the well, as will be readily understood.

From the above description 'it will be apparent that I have produced extracting appliances for use in oil or gas wells, possessing the features of advantage enumerated as desirable, and while I have illustrated and "described the preferred embodiment of the invention, I wish it to be understood that .I do not desire to be restricted to the exact details of construction shown and dejcylinder' having a portion of is free to slide upscribed, as obvious modifications will suggest themselves to one skilled in the art.

I claim 1. An extracting appliance, comprising a cylinder having a portion of downwardlydecreasing internal diameter, a circular slip or gripper to fit within the-cylinder and of downwardly-decreasing external diameter to engage said portion of the cylinder of downwardly decreasing internal diameter;

said slip or gripper being formed internally with teeth and consisting of a plurality of segments pivotally connected together.

2. An extracting appliance, comprising a downwardlydecreasing internal diameter,

or gripper to fit within the cylinder and of downwardly decreasing external diameter 'to engage said portion of the cylinder of downwardly decreasing internal diameter; said slip or gripper being formed internally with teeth and consisting of a. plurality of segments fitting endwise together and interlocked at such ends as regards independent vertical movement'of the segments.

3. An extracting appliance, comprisin a cylinder, having a portion of downwarflydecreasing internal diameter, a circular slip or gripper to fit within the cylinder and of downwardly decreasing external diameter to engage said portion of the cylinder of downwardly decreasing internal diameter;

, said slip or gripper being formed internally a circular slipwith teeth, and consisting of a plurality of segments fitting endwise together and intervertical movement of the-segments; and a locked at such ends as regards independent vertical pivot pin extending downward" through abutting ends of the sections.

4. An extracting appliance, comprising a cylinder having a portion of downwardlydecreasing internal diameter, a circular sllp or gripper to fit within the cylinder and of downwardly decreasing external diameter to engage said portion of the cylinder ofv downwardly decreasing internal diameter;

said slip or gripper being formed internally with teeth and consisting of a plurality of segments pivotally connected together, a spring fitting in the cylinder upon the up per or enlarged end of the slip or gripper, a ring fitting in'the cylinder upon the upper end of the spring, and a tube secured in the upper end of the cylinder and overly ing the ring thereof.

5.;An extracting appliance, comprising a cylinder, having a portion of downwardlydecreasing internal diameter, and a flaring mouthat its lower end, a circular slip or gripper to fit within the cylinder and of downwardlydecreasing external diameter to engage said portion of the cylinder of of downwardly-decreasing internal diameter; said slip or gripper being. formed 1nto prevent upward movement ternally with teeth and consisting of a plurality of segments pivotally connected together, and beveled at their lower ends to provide a downwardly flaring mouth, and a tube secured at its lower end to the upper end of the cylinder.

6. A circular slip or gripper of downwardly-tapering external diameter and provided internally with upwardly and inwardly disposed teeth, and consistingof a plurality of segments each terminating at one end in a V-shaped projection and at the other in a V-shaped notch, the notch of one segment receiving the projection of the other, and a pivot pin extending down 15 through the notched end of one segment and the V-shaped end of the other to permit the segments to swing toward or, from each other.

In testimony whereof I aflix my signa- 20 ture, in the presence of two witnesses.

A. P. MCBRIDE, J12, THOS. F. MACDONALD. 

